package com.itheima_04;

public class StringTest04 {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3};
        String s = arrayToString(arr);
        System.out.println(s);
    }

    public static String arrayToString(int[] arr) {
        String s = "";

        s += "[";

        for (int i = 0; i < arr.length; i++) {
            if (i == arr.length - 1) {
                s += arr[i];
            } else {
                s += arr[i];
                s += ",";
            }
        }

        s += "]";

        return s;
    }

    public static String arrayToStringBySB(int[] arr) {
        StringBuilder sb = new StringBuilder();

        sb.append("[");

        for (int i = 0; i < arr.length; i++) {
            if (i == arr.length - 1) {
                sb.append(arr[i]);
            } else {
                sb.append(arr[i]);
                sb.append(",");
            }
        }

        sb.append("]");

        return sb.toString();
    }
}
